What are some legitimate work from home careers? If you work from home and make 20k or more a year, can you tell me what your job is and how I can get into it?

I'm not talking about beermoney type jobs, but something you can do from home that is truly mobile and that pays a decent wage. I'm willing to go back to school/complete years of training to make this happen.

But I get the feeling that I'm not even aware of some of the opportunities out there. Reddit, do you want to help me out?